JSON取值前判断

作者: 淡淡的忧伤有木有
来源: 51数据库
2020-07-30

这篇文章主要介绍了JSON取值前判断,需要的朋友可以参考下

复制代码代码如下:

public static void main(String[] args)throws Exception{

     String jsonStr1="{"access_token":"OezXcEiiBSKSxW0eoylIeIVb08lFhyeFsq6cUJJNo8XYLoJjqYARJOZUrnqhfvnyMKOSjz5SHPHGUmt6f09_762MWQ0HLnZtffDPyD2A6TgCqWlZAEsHLhIaaQVYx1lywxOWQTrr7rX13i_w1INGnw","expires_in":7200,"openid":"owYTUs68SXYX83wBvm_uN4Ya****","scope":"snsapi_base"}";    

    String jsonStr2="{"access_token":"OezXcEiiBSKSxW0eoylIeIVb08lFhyeFsq6cUJJNo8XYLoJjqYARJOZUrnqhfvnyMKOSjz5SHPHGUmt6f09_762MWQ0HLnZtffDPyD2A6TgCqWlZAEsHLhIaaQVYx1lywxOWQTrr7rX13i_w1INGnw","expires_in":7200,"refresh_token":"OezXcEiiBSKSxW0eoylIeIVb08lFhyeFsq6cUJJNo8XYLoJjqYARJOZUrnqhfvnyuq9ojibRxolf9ElS7PSM0Kz1OTNlJ8ZKJl2BfbPi0LA-nQ9uNVUE8ujLFsdCeP79_L9FmIYcmHLXWXnl-fUsVg","openid":"owYTUs68SXYX83wBvm_uN4Y****","scope":"snsapi_base"}";    

    JSONObject json1=JSONObject.fromObject(jsonStr1);

    JSONObject json2=JSONObject.fromObject(jsonStr2);

    String refresh_token_1=null;

    String refresh_token_2=null;

    if(json1.containsKey("refresh_token")){

        refresh_token_1=json1.getString("refresh_token");

    }

    if(json2.containsKey("refresh_token")){

        refresh_token_2=json2.getString("refresh_token");

    }

    System.out.println(refresh_token_1);

    System.out.println(refresh_token_2);

}

运行结果:

复制代码代码如下:

null

OezXcEiiBSKSxW0eoylIeIVb08lFhyeFsq6cUJJNo8XYLoJjqYARJOZUrnqhfvnyuq9ojibRxolf9ElS7PSM0Kz1OTNlJ8ZKJl2BfbPi0LA-nQ9uNVUE8ujLFsdCeP79_L9FmIYcmHLXWXnl-fUsVg

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